Index: ssts-web/src/main/webapp/js/common.js
===================================================================
diff -u -r17296 -r17366
--- ssts-web/src/main/webapp/js/common.js	(.../common.js)	(revision 17296)
+++ ssts-web/src/main/webapp/js/common.js	(.../common.js)	(revision 17366)
@@ -2571,4 +2571,63 @@
 		return temp.toFixed(vfractionDigits);
 	}
 	return v;
+}
+
+//两个数字相加(参数不能为空)
+function add(a, b) {
+    var c, d, e;
+    try {
+        c = a.toString().split(".")[1].length;
+    } catch (f) {
+        c = 0;
+    }
+    try {
+        d = b.toString().split(".")[1].length;
+    } catch (f) {
+        d = 0;
+    }
+    return e = Math.pow(10, Math.max(c, d)), (mul(a, e) + mul(b, e)) / e;
+}
+
+//两个数字相减(参数不能为空)
+function sub(a, b) {
+    var c, d, e;
+    try {
+        c = a.toString().split(".")[1].length;
+    } catch (f) {
+        c = 0;
+    }
+    try {
+        d = b.toString().split(".")[1].length;
+    } catch (f) {
+        d = 0;
+    }
+    return e = Math.pow(10, Math.max(c, d)), (mul(a, e) - mul(b, e)) / e;
+}
+
+//两个数字相乘(参数不能为空)
+function mul(a, b) {
+    var c = 0,
+        d = a.toString(),
+        e = b.toString();
+    try {
+        c += d.split(".")[1].length;
+    } catch (f) {}
+    try {
+        c += e.split(".")[1].length;
+    } catch (f) {}
+    return Number(d.replace(".", "")) * Number(e.replace(".", "")) / Math.pow(10, c);
+}
+
+//两个数字相除(参数不能为空,第二个参数不能为0)
+function div(a, b) {
+    var c, d, e = 0,
+        f = 0;
+    try {
+        e = a.toString().split(".")[1].length;
+    } catch (g) {}
+    try {
+        f = b.toString().split(".")[1].length;
+    } catch (g) {}
+    return c = Number(a.toString().replace(".", "")), d = Number(b.toString().replace(".", "")), mul(c / d, Math.pow(10, f - e));
 }
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