JS獲取鼠標坐標的實例方法_javascript技巧

代碼如下:
var restrictX;
var restrictY;
var tip;
// 鼠標坐標
function mousePosition(ev) {
return {
x : ev.clientX + document.documentElement.scrollLeft - document.documentElement.clientLeft,
y : ev.clientY + document.documentElement.scrollTop - document.documentElement.clientTop
};
}
// 鼠標事件
function mouseMove(ev) {
ev = ev || window.event;
var mousePos = mousePosition(ev);
restrictX = mousePos.x;
restrictY = mousePos.y;
}
document.onmousemove = mouseMove;
document.onclick = mouseMove;

上面的代碼在谷歌和搜狐瀏覽器中獲取的值會不準確，需進行修改，如下：
代碼如下:
var restrictX;
var restrictY;
var tip;
// 鼠標坐標
function mousePosition(ev){
var scrollLeft = document.documentElement.scrollLeft || document.body.scrollLeft;
var scrollTop = document.documentElement.scrollTop || document.body.scrollTop;
return {
x:ev.clientX + scrollLeft - document.documentElement.clientLeft,
y:ev.clientY + scrollTop - document.documentElement.clientTop
};
}
// 鼠標事件
function mouseMove(ev){
ev = ev || window.event;
var mousePos = mousePosition(ev);
restrictX = mousePos.x;
restrictY = mousePos.y;
}
document.onmousemove = mouseMove;
document.onclick = mouseMove;

代碼如下:
var scrollLeft = document.documentElement.scrollLeft || document.body.scrollLeft;
var scrollTop = document.documentElement.scrollTop || document.body.scrollTop;

這兩句為，如果能獲取到鼠標坐標，則去前面，否則用后面的方法獲取鼠標坐標，“|| ”后面的是給WebKit 內(nèi)核的瀏覽器使用

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