// JavaScript Document



//Function to clear the search box
function ClearSearchBox() {
	document.SearchForm.SearchTerm.value = '';
}

//Function to clear the email box
function ClearBox() {
	document.EmailForm.Email.value = '';
}

//Function that checks the search box 
function CheckSearchBox() {
	var SearchTerm = document.SearchForm.SearchTerm.value;	
	if(SearchTerm == '' || SearchTerm.indexOf('Search ') > 0) {
		alert("The search term is required.");
		return false;
	}
}

//Function check the email entered
function CheckEmails() {
	var emailstring = document.EmailForm.Email.value;
	var AtSign = "@"
	var Dot = "."
	var AtSignPOS = emailstring.indexOf(AtSign)
	var emailLength = emailstring.length
	var DotPOS = emailstring.indexOf(Dot)
	
	if (emailstring.indexOf(AtSign)==-1){
	   alert("Please enter a valid email address.")
	   return false
	}
	if (emailstring.indexOf(AtSign)==-1 || emailstring.indexOf(AtSign)==0 || emailstring.indexOf(AtSign)+1==emailLength){
	   alert("Please enter a valid email address.")
	   return false
	}
	if (emailstring.indexOf(Dot)==-1 || emailstring.indexOf(Dot)==0 || emailstring.indexOf(Dot)+1==emailLength){
		alert("Please enter a valid email address.")
		return false
	}
	 if (emailstring.indexOf(AtSign,(AtSignPOS+1))!=-1){
		alert("Please enter a valid email address.")
		return false
	 }
	 if (emailstring.substring(AtSignPOS-1,AtSignPOS)==Dot || emailstring.substring(AtSignPOS+1,AtSignPOS+2)==Dot){
		alert("Please enter a valid email address.")
		return false
	 }
	 if (emailstring.indexOf(Dot,(AtSignPOS+2))==-1){
		alert("Please enter a valid email address.")
		return false
	 }
	 if (emailstring.indexOf(" ")!=-1){
		alert("Please enter a valid email address.")
		return false
	 }
}