60个很实用的jQuery代码开发技巧收集

Detect Safari (if( $.browser.safari)),
Detect IE6 and over (if ($.browser.msie && $.browser.version > 6 )),
Detect IE6 and below (if ($.browser.msie && $.browser.version <= 6 )),
Detect FireFox 2 and above (if ($.browser.mozilla && $.browser.version >= '1.8' ))

var el = $('#id');
el.html(el.html().replace(/word/ig, ''));

$(document).bind('contextmenu',function(e){ return false; });

$.expr[':'].mycustomselector = function(element, index, meta, stack){
// element- is a DOM element
// index - the current loop index in stack
// meta - meta data about your selector
// stack - stack of all elements to loop
// Return true to include current element
// Return false to explude current element
};
// Custom Selector usage:
$('.someClasses:test').doSomething();

if ($('#someDiv').length) {//hooray!!! it exists...}

$("#someelement").live('click', function(e) {
 if( (!$.browser.msie && e.button == 0) || ($.browser.msie && e.button == 1) ) {
  alert("Left Mouse Button Clicked");
 }
 else if(e.button == 2)
  alert("Right Mouse Button Clicked");
});

26. 显示或者删除输入框的缺省值

//This snippet will show you how to keep a default value
//in a text input field for when a user hasn't entered in
//a value to replace it
swap_val = [];
$(".swap").each(function(i){
 swap_val[i] = $(this).val();
 $(this).focusin(function(){
  if ($(this).val() == swap_val[i]) {
   $(this).val("");
  }
 }).focusout(function(){
  if ($.trim($(this).val()) == "") {
   $(this).val(swap_val[i]);
  }
 });
});

<INPUT class=swap value="Enter Username here.." type=text>

//Here's how we used to do it in 1.3.2 using setTimeout
setTimeout(function() {
 $('.mydiv').hide('blind', {}, 500)
}, 5000);
//And here's how you can do it with 1.4 using the delay() feature (this is a lot like sleep)
$(".mydiv").delay(5000).hide('blind', {}, 500);