键盘实现网页翻页

/**//**


* @module focus.common


*


* 实现键盘翻页功能(PageUp/PageDown)


*


* @author J. Jiang <jiangjing@focus.cn>


* @create 2006-6-15


* @update


*/


var re = /<a href=["']?([-w./?]+)["']?>[[(<]?上一页[])>]?</a>/igm;


if (window.document.body.innerHTML.search(re) >= 0) {


var PREVIOUS_PAGE = RegExp.$1;


alert(re+PREVIOUS_PAGE);


}




var re = /<a href=["']?([-w./?]+)["']?>[[(<]?下一页[])>]?</a>/igm;


if (window.document.body.innerHTML.search(re) >= 0) {


var NEXT_PAGE = RegExp.$1;


alert(NEXT_PAGE);


}


if (typeof PREVIOUS_PAGE == "string" || typeof NEXT_PAGE == "string") {


document.onkeydown = function() {


switch (event.srcElement.tagName) {


case "INPUT":


case "TEXTAREA":


case "SELECT":


break;


default:


if (event.keyCode == 37 /* Arrow Left*/ && typeof PREVIOUS_PAGE == "string") {


window.location.href = PREVIOUS_PAGE;


}


else if (event.keyCode == 39 /* Arrow Right */ && typeof NEXT_PAGE == "string") {


window.location.href = NEXT_PAGE;


}


}


}


}