【javascript方法函数小结】

1.加载样式文件

function LoadStyle(url) {

try {
document.createStyleSheet(url)
} catch(e) {
var cssLink = document.createElement('link');
cssLink.rel = 'stylesheet';
cssLink.type = 'text/css';
cssLink.href = url;
var head = document.getElementsByTagName('head')[0];
head.appendChild(cssLink)
}
}

2.返回脚本内容

function evalscript(s) {
	if(s.indexOf('
			var p = /]*?>([^\x00]*?)<\/script>/ig;
			var arr = [];
			while(arr = p.exec(s)) {
				var p1 = /]*?src=\"([^\>]*?)\"[^\>]*?(reload=\"1\")?(?:charset=\"([\w\-]+?)\")?><\/script>/i;
				var arr1 = [];
				arr1 = p1.exec(arr[0]);
				if(arr1) {
					appendscript(arr1[1], '', arr1[2], arr1[3]);
				} else {
					p1 = /([^\x00]+?)<\/script>/i;
					arr1 = p1.exec(arr[0]);
					appendscript('', arr1[2], arr1[1].indexOf('reload=') != -1);
				}
			}
			return s;
		}

3.清除脚本内容

function stripscript(s) {
	return s.replace(/.*?<\/script>/ig, '');
}

4.动态加载脚本文件

function appendscript(src, text, reload, charset) {
	var id = hash(src + text);
	if(!reload && in_array(id, evalscripts)) return;
	if(reload && $(id)) {
		$(id).parentNode.removeChild($(id));
	}
	evalscripts.push(id);
	var scriptNode = document.createElement("script");
	scriptNode.type = "text/javascript";
	scriptNode.id = id;
	scriptNode.charset = charset ? charset : (BROWSER.firefox ? document.characterSet : document.charset);
	try {
		if(src) {
			scriptNode.src = src;
			scriptNode.onloadDone = false;
			scriptNode.onload = function() {
				scriptNode.onloadDone = true;
				JSLOADED[src] = 1;
			};
			scriptNode.onreadystatechange = function() {
				if((scriptNode.readyState == 'loaded' || scriptNode.readyState == 'complete') && !scriptNode.onloadDone) {
					scriptNode.onloadDone = true;
					JSLOADED[src] = 1;
				}
			};
		} else if(text) {
			scriptNode.text = text;
		}
		document.getElementsByTagName('head')[0].appendChild(scriptNode);
	} catch(e) {}
}

5.返回按ID检索的元素对象

function $(id) {
	return !id ? null : document.getElementById(id);
}

6.跨浏览器绑定事件

function addEventSamp(obj, evt, fn) {
	if(!oTarget) {
		return;
	}
	if(obj.addEventListener) {
		obj.addEventListener(evt, fn, false);
	} else if(obj.attachEvent) {
		obj.attachEvent('on' + evt, fn);
	} else {
		oTarget["on" + sEvtType] = fn;
	}
}

7.跨浏览器删除事件

function delEvt(obj, evt, fn) {
if(!obj) {
return;
}
if(obj.addEventListener) {
obj.addEventListener(evt, fn, false);
} else if(oTarget.attachEvent) {
obj.attachEvent("on" + evt, fn);
} else {
obj["on" + evt] = fn;
}
}

耐得住寂寞，守得了繁华