function echeck(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1){
		   alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    alert("Invalid E-mail ID")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    alert("Invalid E-mail ID")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    alert("Invalid E-mail ID")
		    return false
		 }

 		 return true					
	}

function ValidateForm(){
	var name=document.comregister.name
	var emailID=document.comregister.email
	var phoneno=document.comregister.phoneno
	var mobile=document.comregister.mobile
	var company=document.comregister.company
	var website=document.comregister.website
	var designation=document.comregister.designation
	
	if ((name.value==null)||(name.value=="")){
		alert("Please Enter your name")
		name.focus()
		return false
	}
  
  if ((emailID.value==null)||(emailID.value=="")){
		alert("Please Enter your Email ID")
		emailID.focus()
		return false
	}
		if (echeck(emailID.value)==false){
		emailID.value=""
		emailID.focus()
		return false
	}
	
	if ((phoneno.value==null)||(phoneno.value=="")){
		alert("Please Enter your phone no")
		phoneno.focus()
		return false
	}
	
	if ((mobile.value==null)||(mobile.value=="")){
		alert("Please Enter your mobile no")
		mobile.focus()
		return false
	}
	
	if ((company.value==null)||(company.value=="")){
		alert("Please Enter your company name")
		company.focus()
		return false
	}
	
  //
	if ((website.value==null)||(website.value=="")){
		alert("Please Enter your website")
		website.focus()
		return false
	}
	
	if ((designation.value==null)||(designation.value=="")){
		alert("Please Enter your designation")
		website.focus()
		return false
	}

	return true
 }