var junkcharArray = new Array('/', '!', '@', '~', '`', '#', '$', '%', '^', '&', '*', '(', ')', '+', '=', '"', '?', '/', '>', '<', ',', '.');

function mailpage()
{
	mail_str = "mailto:?subject=Check out the " + document.title;
	mail_str += "&body=I thought you might be interested in the " + document.title;
	mail_str += ". You can view it at, " + location.href; 
	location.href = mail_str;
}
function validTextField1 (string)
{
	if ((string == "") || ((string.split(" ").length-1) == string.length))
		return false;

	//return true;
	var i, j;
	for (i = 0; i < string.length; i++)
	{
		for (j = 0; j < junkcharArray.length; j++)
		{
			if (string.charAt(i) == junkcharArray[j])
			{
				alert("Junk characters are not allowed in the field!")
				return false;
			}
		}
	}	
	
	return true;
}

function emailCheck (emailStr) 
		{

		var emailPat=/^(.+)@(.+)$/
		var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
		var validChars="\[^\\s" + specialChars + "\]"
		var quotedUser="(\"[^\"]*\")"

		var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
		
		var atom=validChars + '+'

		var word="(" + atom + "|" + quotedUser + ")"

		var userPat=new RegExp("^" + word + "(\\." + word + ")*$")

		var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")

		var matchArray=emailStr.match(emailPat)
		if (matchArray==null)
		{
			alert("Please enter a valid e-mail address!");
			return false
		}
		var user=matchArray[1]
		var domain=matchArray[2]

		if (user.match(userPat)==null) 
		{
			alert("Please enter a valid e-mail address!");
			return false
		}

		var IPArray=domain.match(ipDomainPat)
		if (IPArray!=null) {

			  for (var i=1;i<=4;i++) {
				if (IPArray[i]>255) {
				alert("Please enter a valid e-mail address!");
				return false
				}
			}
		return true
	}

	var domainArray=domain.match(domainPat)
	if (domainArray==null) {
		alert("Please enter a valid e-mail address!");
		return false
	}


	var atomPat=new RegExp(atom,"g")
	var domArr=domain.match(atomPat)
	var len=domArr.length
	if (domArr[domArr.length-1].length<2 || 
		domArr[domArr.length-1].length>3) {
		alert("Please enter a valid e-mail address!");	   
	   return false
	}

	if (len<2) {
	   var errStr="This address is missing a hostname!"
	   alert("Please enter a valid e-mail address!");
	   return false
	}

	return true;
}


function validTextField(string){
	var expUsrName = /^(([A-Za-z0-9_.,-]*)(\/)*([A-Za-z0-9_.,-]*))*$/i;
	var UsrName = string;
	var UsrNameTrim	= "";
	if ( ( UsrName.charAt(0) == " " ) || ( UsrName.charAt(UsrName.length-1) == " " ) )
	{
		alert("No leading or trailing blank spaces allowed!");
		return false;
	}
	for (var i=0; i<= UsrName.length; i++){
		if(UsrName.charAt(i) != " "){
			UsrNameTrim +=	UsrName.charAt(i);		
		}
	}		
	if (!expUsrName.test (UsrNameTrim))
    {
        /*errMsg+="Please enter a valid Password.\n";
        flag = "1";
        flag1 = "1";	 */
    	//document.getElementById ("name").style.color = "red";
		alert("Invalid character! Only alphanumeric characters, fullstops, commas, hyphens, underscores, and blank spaces are allowed.");
		return false;
	 }
	 else if ( UsrNameTrim == "" ){
		alert("Fields marked * cannot be left blank!");
		return false;
	 }
	 else{
		 return true;
	 }
}
function validUserIdField(string){  
	var expUsrName = /^([A-Za-z0-9_.,-])*$/i;
	var UsrName	 = string;
		
	if (!expUsrName.test (UsrName))
    {
        alert("Invalid character! Only alphanumeric characters, fullstops, commas, hyphens, and underscores are allowed.");
		return false;
	 }
	 
	 else{
		 return true;
	 }
}
function validSearchField(string){
	var expUsrName = /^([A-Z0-9a-z])*$/i;
	var UsrName = string;
	var UsrNameTrim	= "";
	for (var i=0; i<= UsrName.length; i++){
		if(UsrName.charAt(i) != " "){
			UsrNameTrim +=	UsrName.charAt(i);		
		}
	}		
	if (!expUsrName.test (UsrNameTrim))
    {
        /*errMsg+="Please enter a valid Password.\n";
        flag = "1";
        flag1 = "1";	 */
    	//document.getElementById ("name").style.color = "red";
		alert("Invalid character! Only alphanumeric characters and blank spaces are allowed.");
		return false;
	 }
	 /*else if ( UsrNameTrim == "" ){
		alert("Fields marked * cannot be left blank!");
		return false;
	 }*/
	 else{
		 return true;
	 }
}