通用于ie和firefox的函数 GetCurrentStyle (obj, prop)

function GetCurrentStyle (obj, prop) {if (obj.currentStyle) {return obj.currentStyle[prop];}else if (window.getComputedStyle) {prop = prop.replace (/([A-Z])/g, "-$1");prop = prop.toLowerCase ();return window.getComputedStyle (obj, "").getPropertyValue(prop);}return null;}