function sltrim(s)
        {
          while ((s.charAt(0) == ' ')&(s.length > 0)) {
             s=s.substring(1,s.length);
          }
             return s;
        }


        function trim(s) {
//      убирает первые и последние пробелы в строке 
//           return s.replace(/^\s*(\S*)\s*$/, "$1");
        return s.replace(/^\s*(\S*.*?\S*)\s*$/,'$1');
        }

        function no_sl_simv(s) {
           return s.replace(/["'<>%\\]/g,' ')
        }

        function no_simv(s) {
           return s.replace(/['<>\\]/g,' ')
        }

	function CheckRegForm()
        {
//alert("проверка формы");
        document.registr_colloquium.Name.value = trim(no_sl_simv(document.registr_colloquium.Name.value ));

	if ( sltrim(document.registr_colloquium.Name.value) == '')
	{ alert("Please fill in 'First Name'");
        document.registr_colloquium.Name.focus(); return false; }

	if ( sltrim(document.registr_colloquium.LastName.value) == '')
	{ alert("Please fill in 'Last Name'");
        document.registr_colloquium.LastName.focus(); return false; }

	if ( sltrim(document.registr_colloquium.Address.value) == '')
	{ alert("Please fill in 'Address'");
        document.registr_colloquium.Address.focus(); return false; }

	if ( sltrim(document.registr_colloquium.City.value) == '')
	{ alert("Please fill in 'City'");
        document.registr_colloquium.City.focus(); return false; }

	if ( sltrim(document.registr_colloquium.State.value) == '')
	{ alert("Please fill in 'State'");
        document.registr_colloquium.State.focus(); return false; }

	if ( sltrim(document.registr_colloquium.Zip.value) == '')
	{ alert("Please fill in 'Zip Code'");
        document.registr_colloquium.Zip.focus(); return false; }

	if ( sltrim(document.registr_colloquium.Country.value) == '')
	{ alert("Please fill in 'Country'");
        document.registr_colloquium.Country.focus(); return false; }

	if ( sltrim(document.registr_colloquium.Phone.value) == '')
	{ alert("Please fill in 'Telephone'");
        document.registr_colloquium.Phone.focus(); return false; }

	if ( sltrim(document.registr_colloquium.Em.value) == '')
	{ alert("Please fill in 'Email Address'");
        document.registr_colloquium.Em.focus(); return false; }

	if ( sltrim(document.registr_colloquium.Occupation.value) == '')
	{ alert("Please fill in 'Occupation'");
        document.registr_colloquium.Occupation.focus(); return false; }

	if ( sltrim(document.registr_colloquium.JobTitle.value) == '')
	{ alert("Please fill in 'Job Title'");
        document.registr_colloquium.JobTitle.focus(); return false; }

	if ( sltrim(document.registr_colloquium.Organization.value) == '')
	{ alert("Please fill in 'Place of work'");
        document.registr_colloquium.Organization.focus(); return false; }


//        alert(document.registr_colloquium.radiostat[0].checked);
//        alert(document.registr_colloquium.radiostat[1].checked);
        if (document.registr_colloquium.radiostat1[0].checked )
	{ 
//            alert("проверка полей для сопровождающего лица");
        document.registr_colloquium.Name_assist.value = trim(no_sl_simv(document.registr_colloquium.Name_assist.value ));


	if ( sltrim(document.registr_colloquium.Name_assist.value) == '')
	{ alert("Please fill in 'First Name' for an accompanying person");
        document.registr_colloquium.Name_assist.focus(); return false; }

	if ( sltrim(document.registr_colloquium.LastName_assist.value) == '')
	{ alert("Please fill in 'Last Name' for an accompanying person");
        document.registr_colloquium.LastName_assist.focus(); return false; }

	if ( sltrim(document.registr_colloquium.Address_assist.value) == '')
	{ alert("Please fill in 'Address' for an accompanying person");
        document.registr_colloquium.Address_assist.focus(); return false; }

	if ( sltrim(document.registr_colloquium.City_assist.value) == '')
	{ alert("Please fill in 'City' for an accompanying person");
        document.registr_colloquium.City_assist.focus(); return false; }

	if ( sltrim(document.registr_colloquium.State_assist.value) == '')
	{ alert("Please fill in 'State' for an accompanying person");
        document.registr_colloquium.State_assist.focus(); return false; }

	if ( sltrim(document.registr_colloquium.Zip_assist.value) == '')
	{ alert("Please fill in 'Zip Code' for an accompanying person");
        document.registr_colloquium.Zip_assist.focus(); return false; }

	if ( sltrim(document.registr_colloquium.Country_assist.value) == '')
	{ alert("Please fill in 'Country' for an accompanying person");
        document.registr_colloquium.Country_assist.focus(); return false; }

	if ( sltrim(document.registr_colloquium.Phone_assist.value) == '')
	{ alert("Please fill in 'Telephone' for an accompanying person");
        document.registr_colloquium.Phone_assist.focus(); return false; }

	if ( sltrim(document.registr_colloquium.Em_assist.value) == '')
	{ alert("Please fill in 'Email Address' for an accompanying person");
        document.registr_colloquium.Em_assist.focus(); return false; }

	if ( sltrim(document.registr_colloquium.Occupation_assist.value) == '')
	{ alert("Please fill in 'Occupation' for an accompanying person");
        document.registr_colloquium.Occupation_assist.focus(); return false; }

	if ( sltrim(document.registr_colloquium.JobTitle_assist.value) == '')
	{ alert("Please fill in 'Job Title' for an accompanying person");
        document.registr_colloquium.JobTitle_assist.focus(); return false; }

	if ( sltrim(document.registr_colloquium.Organization_assist.value) == '')
	{ alert("Please fill in 'Place of work' for an accompanying person");
        document.registr_colloquium.Organization_assist.focus(); return false; }
        };

	return true;

        }

        function assist_form() {
//        alert("нажата радиокнопка");
//        alert(document.registr_colloquium.radiostat1[0].checked);
//        alert(document.registr_colloquium.radiostat1[1].checked);
        if (document.registr_colloquium.radiostat1[0].checked)
        {   
//alert ("выводим форму");
document.getElementById('assist_pers').innerHTML = '<p>If yes, then fill in the <b>registration form for an accompanying person</b>, please.</p><p class=ur2m>Registration Form (<u>Accompanying person</u>)<br>&nbsp;</p><table cellspacing=2 cellpadding=4 border=0 width=460 align=center><tr class=grey><td class=ult_3 height=25 width=150><p>First Name:</td><td  height=25 width=300><input type=text name=Name_assist style=width:100%;></td></tr><tr class=grey><td class=ult_3 height=25 width=150><p>Last Name:</td><td  height=25 width=300><input type=text name=LastName_assist style=width:100%;></td></tr><tr class=grey><td class=ult_3 height=25><p> Address:</td><td  height=25><input type=text name=Address_assist style=width:100%;></td></tr><tr class=grey><td class=ult_3 height=25><p> City:</td><td  height=25><input type=text name=City_assist style=width:100%;></td></tr><tr class=grey><td class=ult_3 height=25><p> State:</td><td  height=25><input type=text name=State_assist style=width:100%;></td></tr><tr class=grey><td class=ult_3 height=25><p> Zip Code:</td><td  height=25><input type=text name=Zip_assist style=width:100%;></td></tr><tr class=grey><td class=ult_3 height=25><p> Country:</td><td  height=25><input type=text name=Country_assist style=width:100%;></td></tr><tr class=grey><td class=ult_3 height=25><p> Telephone:</td><td  height=25><input type=text name=Phone_assist style=width:100%;></td></tr><tr class=grey><td class=ult_3 height=25><p> Email Address:</td><td  height=25><input type=text name=Em_assist style=width:100%;></td></tr><tr class=grey><td class=ult_3 height=25><p> Occupation:</td><td  height=25><input style=width:100%; type=text name=Occupation_assist></td></tr><tr class=grey><td class=ult_3 height=25><p> Job Title:</td><td  height=25><input style=width:100%; type=text name=JobTitle_assist></td></tr><tr class=grey><td class=ult_3 height=25 ><p> Place of work:</td><td  height=25><input type=text name=Organization_assist style=width:100%;></td></tr><tr class=grey><td class=ult_3 height=25 ><p> Please list any food restrictions:</td><td  height=25><input type=text name=Food_assist style=width:100%;></td></tr></table>';

//<tr class=grey><td class=ult_3 height=25 width=150><p>First Name:</td><td  height=25 width=300><input type=text name=Name_assist style=width:100%;></td></tr><tr class=grey><td class=ult_3 height=25 width=150><p>Last Name:</td><td  height=25 width=300><input type=text name=LastName_assist style=width:100%;></td></tr><tr class=grey><td class=ult_3 height=25><p> Address:</td><td  height=25><input type=text name=Address_assist style=width:100%;></td></tr><tr class=grey><td class=ult_3 height=25><p> City:</td><td  height=25><input type=text name=City_assist style=width:100%;></td></tr><tr class=grey><td class=ult_3 height=25><p> State:</td><td  height=25><input type=text name=State_assist style=width:100%;></td></tr><tr class=grey><td class=ult_3 height=25><p> Zip Code:</td><td  height=25><input type=text name=Zip_assist style=width:100%;></td></tr><tr class=grey><td class=ult_3 height=25><p> Country:</td><td  height=25><input type=text name=Country_assist style=width:100%;></td></tr><tr class=grey><td class=ult_3 height=25><p> Telephone:</td><td  height=25><input type=text name=Phone_assist style=width:100%;></td></tr><tr class=grey><td class=ult_3 height=25><p> Email Address:</td><td  height=25><input type=text name=Em_assist style=width:100%;></td></tr><tr class=grey><td class=ult_3 height=25><p> Occupation:</td><td  height=25><input style=width:100%; type=text name=Occupation_assist></td></tr><tr class=grey><td class=ult_3 height=25><p> Job Title:</td><td  height=25><input style=width:100%; type=text name=JobTitle_assist></td></tr><tr class=grey><td class=ult_3 height=25 ><p> Place of work:</td><td  height=25><input type=text name=Organization_assist style=width:100%;></td></tr><tr class=grey><td class=ult_3 height=25 ><p> Please list any food restrictions:</td><td  height=25><input type=text name=Food_assist style=width:100%;></td>	</tr>

        } else {
//        alert ("стираем форму");
document.getElementById('assist_pers').innerHTML = '';
        }

        }