//function used to validate login form starts
function try_login(e)
{
	if(e.keyCode==13)
	{
		if (navigator.appName=="Netscape")
		{
		   e.preventDefault();
		}
		else
		  e.keyCode=0;
		  
	  	login_validation();
	}
}
function trimAll( strValue ) 
{
 var objRegExp = /^(\s*)$/;
  if(objRegExp.test(strValue)) 
    {
	strValue = strValue.replace(objRegExp, '');
	if( strValue.length == 0)
	return strValue;
	}
	objRegExp = /^(\s*)([\W\w]*)(\b\s*$)/;
	if(objRegExp.test(strValue)) 
		{
	strValue = strValue.replace(objRegExp, '$2');
		}
	return strValue;

}
  
function login_validation()
{		
	with(document.forms['frm_admin_login'])
	{
              if(trimAll(get_username.value)=="")
		{
			alert("Please enter username!");
			get_username.focus();
			//document.getElementById("loginusername").className="errorTextBox";
			return false;
		}
		else if(trimAll(get_password.value)=="")
			{
			alert("Please enter password!");
			get_password.focus(); 
			return false;
			}
		else
		{
			act.value="login";
			submit();
			return true;
		}
	}
}
function page_update_validate()
{		
	with(document.forms['frm_update_pages'])
	{
		act.value="update";
		submit();
		return true;
	}
}
function show_preview(get_preview_page)
{
	url = 'show_preview.php';
	params = '?section=preview&file='+get_preview_page;
	//alert(url+params);
	window.open(url+params,'popupwindow','left=0,top=0,width=600,height=500,scrollbars=1,resizable=1');
}
//function used to validate login form ends