jQuery: HTML Protector

jquery_html_protector.js

//
// From Googling, update: 2012-10-01
//

var disableContextMenu = function(){
	return this.each(function(){
                
		$(this).bind('contextmenu', function(){return false})
		$(this).mousedown(function(){return false})
		$(this).click(function(){return true})
                
                if($.browser.mozilla){ //Firefox
			$(this).css('MozUserSelect','none')
		}else if($.browser.msie){ //IE
			$(this).bind('selectstart', function(){return false})
		}
	})
}

var enableTextSelect = function(){
        var txt = $(':input')
        txt.bind('contextmenu', function(){return true})
	txt.mousedown(function(){return true})
        txt.click(function(){return true})
                
        if($.browser.mozilla){ //Firefox
            txt.css('MozUserSelect','text')
        }else if($.browser.msie){ //IE
            txt.bind('selectstart', function(){return true})
        }
        
        return txt
}

var disableRestrictedKey = function(){
	return $(this).keydown(function(e){
		if(e.ctrlKey){
                    if(e.keyCode == 65 || e.keyCode == 70 || e.keyCode == 85 || e.keyCode == 83){  /*Ctrl+A; Ctrl+F; Ctrl+U; Ctrl+S;*/
			return false
                    }
		}else if(e.altKey){
                    return false
		}
	})
}

var disablePrintScreen = function(){
        /* PrintScr */
        return $(this).keyup(function(e){
            if(e.keyCode == 44){ 
                alert("Peringatan...!\nSekedar mengingatkan bahwa web ini berada dibawah perlindungan copyright.");
                $("contact").focus();
                return false
            }
        }) && $(this).keypress(function(e){
            if(e.keyCode == 44){
                alert("Peringatan...!\nSekedar mengingatkan bahwa web ini berada dibawah perlindungan copyright.");
                $("contact").focus();
                return false
            }
        }) && $(this).keydown(function(e){
            if(e.keyCode == 44){
                alert("Peringatan...!\nSekedar mengingatkan bahwa web ini berada dibawah perlindungan copyright.");
                $("contact").focus();
                return false
            }
        })
}

/* Extends */
$.extend($.fn.disableRestrictedKey = disableRestrictedKey)
$.extend($.fn.disableContextMenu = disableContextMenu)
$.extend($.fn.enableTextSelect = enableTextSelect)
$.extend($.fn.disablePrintScreen = disablePrintScreen)

$(document).ready(function(){
	$(window)
	.disableRestrictedKey()
	.disableContextMenu()
        .disablePrintScreen()
	
	$(document)
	.disableRestrictedKey()
	.disableContextMenu()
        .disablePrintScreen()
        
        $('input[type=txt_username], input[name=txt_password], input:text').click(function(){
            $(this).focus()
        })
        
        $('#login_form')
        .disableRestrictedKey()
        .enableTextSelect()
});