jquery获取(设置)文本框(块)内光标位置插件v2

/**
 * @author 全冠清
 */
$.fn.extend({
	position:function( value ){
		var elem = this[0];
			if (elem&&(elem.tagName=="TEXTAREA"||elem.type.toLowerCase()=="text")) {
			   if($.browser.msie){
					   var rng;
					   if(elem.tagName == "TEXTAREA"){ 
						    rng = elem.createTextRange();
					   }else{ 
					    	rng = document.selection.createRange();
					   }
					   if( value === undefined ){
					   	 rng.moveStart("character",-elem.value.length);
					     return  rng.text.length;
					   }else if(typeof value === "number" ){
					   	 var index=this.position();
						  rng.moveStart("character",value)
						   rng.moveEnd("character",value-index+1)
						 rng.select();
					   }
				}else{
					if( value === undefined ){
					   	 return elem.selectionStart;
					   }else if(typeof value === "number" ){
					   	 elem.selectionEnd = value;
       			         elem.selectionStart = value;
					   }
				}
			}else{
				if( value === undefined )
				   return undefined;
			}
	}
})

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2 楼 yunnaneryuan 2012-09-12  

yunnaneryuan 写道

1 楼 yunnaneryuan 2012-09-12