// java-script Document

function checkBlank(formelement,text)
{
 if(formelement.value=='')
 {
  alert('Enter '+text);
  formelement.focus();
 return false;
  }
 else
 {
 return true;
 }
}

function checkEmail(formelement,text) 

{
 if(formelement.value!='')
 {
 var b=formelement.value.indexOf('@');
 var c=formelement.value.indexOf('.');
 var d=c-b;
 var len=formelement.value.length;

  if((d==0)||(c==-1)||(b==-1)||(d==1)||((len-c)==1))
  {
   alert("Enter a valid "+text);
   formelement.focus();
   return false;
  }
  else
  {
   return true;
  }
 }
}

function ValidateForm(){
 
 if(!checkBlank(document.form1.Name,'Your Name')) return false;
 if(!checkBlank(document.form1.Email,'Email')) return false;
 if(!checkEmail(document.form1.Email,'Email')) return false;
 if(!checkBlank(document.form1.TelNo,'Telephone.no')) return false;
 if(!checkBlank(document.form1.companyname,'Company Name')) return false;
 
//===================================================== 
 return true
 }