所属类别：JavaScript

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html－www.51windows.Net<!--//checkbox元素的名字前缀，本例为sample1,sample2,sample3...var sCtrlPrefix = "sample";//checkbox元素数量，本例有18个；var iMaxCheckbox = 18;//设置最大允许选择的数量；var iMaxSelected = 5;function doCheck(ctrl) {var iNumChecked = 0;var thisCtrl;var i;//初始化i = 1;//循环直到选中了最多的checkbox;while ((i <= iMaxCheckbox) && (iNumChecked <= iMaxSelected)) {thisCtrl = eval("ctrl.form." + sCtrlPrefix + i);if ((thisCtrl != ctrl) && (thisCtrl.checked)) {iNumChecked++;}i++;}// 检查是否达到了最大选择数量；if (iNumChecked == iMaxSelected) {// 如果是则uncheck刚选择的元素；ctrl.checked = false;}}// -->ABCDEFGHIJKLMNOPQR

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