function show_hide(ISID){
      // Toggle visibility between none and inline
      if ((document.getElementById(ISID).style.display == 'none'))
      {
        document.getElementById(ISID).style.display = 'inline';
      } else {
        document.getElementById(ISID).style.display = 'none';
      }
  }

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 Address Format")
		   return false
		}

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

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

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

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

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

		 if (str.indexOf(" ")!=-1){
		    alert("Invalid E-mail Address Format")
		    return false
		 }

 		 return true
	}

function ValidateForm(){
	var emailID=document.Form1.email

	if ((emailID.value==null)||(emailID.value=="")){
		alert("Please Enter your Email Address")
		emailID.focus()
		return false
	}
	if (echeck(emailID.value)==false){
		emailID.value=""
		emailID.focus()
		return false
	}
	return true
 }

function ValidateMail(){
	var emailID=document.myform.Email

	if ((emailID.value==null)||(emailID.value=="")){
		alert("Please Enter your Email Address")
		emailID.focus()
		return false
	}
	if (echeck(emailID.value)==false){
		emailID.value=""
		emailID.focus()
		return false
	}
	return true
 }


function clearDefaultandCSS(el) {
	if (el.defaultValue==el.value) el.value = ""
	// If Dynamic Style is supported, clear the style
	if (el.style) el.style.cssText = ""
}

function pass_form ( )
{
    valid = true;
    if ( document.myform.Customer.value == "" )
    {
        alert ( "Please fill in your Name." );
        document.myform.Customer.focus();
        return false;
    }
    if ( document.myform.Email.value == "" )
    {
        alert ( "Please fill in your Email Address." );
        document.myform.Email.focus();
        return false;
    }
    if ( document.myform.Comments.value == "" )
    {
        alert ( "Please fill in the Comments field." );
        document.myform.Comments.focus();
        return false;
    }
    if ( document.myform.cap.value == "" )
    {
        alert ( "Please fill in the SPAM Guard." );
        document.myform.cap.focus();
        return false;
    }

}