function isNumber(val) {var regPos = /^\d+(\.\d+)?$/; //非负浮点数var regNeg = /^(-(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*)))$/; //负浮点数if(regPos.test(val) || regNeg.test(val)) {return true;} else {return false;}}
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