javaScript常用方法函数收集
获取当前元素样式:
function getStyle(oElm, strCssRule){
var strValue = "";
if(document.defaultView && document.defaultView.getComputedStyle){
strValue = document.defaultView.getComputedStyle(oElm, "").getPropertyValue(strCssRule);
}
else if(oElm.currentStyle){
strCssRule = strCssRule.replace(/\-(\w)/g, function (strMatch, p1){
return p1.toUpperCase();
});
strValue = oElm.currentStyle[strCssRule];
}
return strValue;
}
如何使用:
例如css代码:
/* Element CSS*/
div#container{
font: 2em/2.25em Verdana, Geneva, Arial, Helvetica, sans-serif;
}
JS代码:
var elementFontSize = getStyle(document.getElementById("container"), "font-size");
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格式化数字,格式化金额:
function number_format(number, decimals, dec_point, thousands_sep) {
/*
* 参数说明:
* number:要格式化的数字
* decimals:保留几位小数
* dec_point:小数点符号
* thousands_sep:千分位符号
* */
number = (number + '').replace(/[^0-9+-Ee.]/g, '');
var n = !isFinite(+number) ? 0 : +number,
prec = !isFinite(+decimals) ? 0 : Math.abs(decimals),
sep = (typeof thousands_sep === 'undefined') ? ',' : thousands_sep,
dec = (typeof dec_point === 'undefined') ? '.' : dec_point,
s = '',
toFixedFix = function (n, prec) {
var k = Math.pow(10, prec);
return '' + Math.ceil(n * k) / k;
};
s = (prec ? toFixedFix(n, prec) : '' + Math.round(n)).split('.');
var re = /(-?\d+)(\d{3})/;
while (re.test(s[0])) {
s[0] = s[0].replace(re, "$1" + sep + "$2");
}
if ((s[1] || '').length < prec) {
s[1] = s[1] || '';
s[1] += new Array(prec - s[1].length + 1).join('0');
}
return s.join(dec);
}
如何使用:
var num=number_format(1234567.089, 2, ".", ",");//1,234,567.09