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("Please Enter valid E-mail ID")
		return false
	}
	
	if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		alert("Please Enter valid E-mail ID")
		return false
	}
	
	if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		alert("Please Enter valid E-mail ID")
		return false
	}
	
	if (str.indexOf(at,(lat+1))!=-1){
		alert("Please Enter valid E-mail ID")
		return false
	}
	
	if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		alert("Please Enter valid E-mail ID")
		return false
	}
	
	if (str.indexOf(dot,(lat+2))==-1){
		alert("Please Enter valid E-mail ID")
		return false
	}
	
	if (str.indexOf(" ")!=-1){
		alert("Please Enter valid E-mail ID")
		return false
	}
return true
}

function ValidateForm(){
	var emailID=document.frmSample.txtEmail
	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
	}
	return true
}

function showtoc() {

	var winW = 630, winH = 460;
	
	if (parseInt(navigator.appVersion)>3) {
	 if (navigator.appName=="Netscape") {
	  winW = window.innerWidth;
	  winH = window.innerHeight;
	 }
	 if (navigator.appName.indexOf("Microsoft")!=-1) {
	  winW = document.body.offsetWidth;
	  winH = document.body.offsetHeight;
	 }
	}
	
	var tocdiv = document.getElementById('toc');
	tocdiv.style.display = "block";
}
function hidetoc() {
	var tocdiv = document.getElementById('toc');
	tocdiv.style.display = "none";
}