function SendForm () {
var err, str, tmp, radiook;
str='';
err=1;

if(document.input.name.value == "") {str="your website Title"; err=0;};
if(document.input.url.value == "") {if(err==0) str=str+', '; str=str+"your website URL"; err=0;};
if(document.input.link.value == "") {if(err==0) str=str+', '; str=str+"the back link URL"; err=0;};
if( err==0) str='Please enter '+str;

if(document.input.category.value == "-1") {if(err==0) str=str+"\n Please select a Category"; err=0;}
if (document.input.mail.value.indexOf( "@", 2) == -1  ||  document.input.mail.value.indexOf( "." , 4) == -1) 
{err=0; str=str + '\nPlease enter a valid e-mail address';} 

radiook=0;
for (i=0; i<document.input.length; i++) 
if (document.input.elements[i].type == 'radio' && document.input.elements[i].checked) radiook=1;
if(radiook == 0)
{
err=0; str=str+ '\nPlease select one of our Text Links'; 
}

if (err==0)
{alert(str); return false; }
return true;
}