function trim(str) {
	return str.replace(/^\s+/g, '').replace(/\s+$/g, '');
}

function isNegative(str) {
	if( isNaN(str) || str <= 0 )
		return true ;
	return false ;
}

function isBlank(str) {
	if( str == "" ) 
		return true ;
	return false ;
}

function isEmail(str) {
	if (str.search(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/) != -1)
            return true ;
    else
            return false ;
    
}

function checkForm(frm, arr_ctrl) {
	var count= arr_ctrl.length ;
	var i=0  ;
	for(i=0; i< count; i++) {
		func= trim( arr_ctrl[i][0] ) ;
		if( eval( func ) ) { //== 
			alert( arr_ctrl[i][1] ) ;
			if( arr_ctrl[i][2] != "" )
				eval( "frm."  + arr_ctrl[i][2] ).focus() ;
			return false ; //== Error
		}
	}
	return true ; //== OK
}